Cupriferous trisazo dyestuffs



wherein R1 stands for the radical of a coupling comor the copper complex thereof, wherein R is the radical 5 ing an hydroxyl group in ortho-position to the azo bridge, and with 1 mol of any other coupling component, the renaphthalene-3,6-d1sulfomc acid, 1 benzoylam1no-8-hy- 2,779,755 Patented Jan. 29, 1%57 2-hydroxynaphthalene-6-su1fonic acid, 79 755 2-hydroxynaphthalene-7-sulfonic acid,

1-hydroxynaphthalene-3,6-disulfonic acid, CUPRIFEROUS TRISAZO DYESTUFFS 1-hydroXynaphthalene-3,8-disulfonic acid, Hans Ruckstuhl and Walter Wehrli, Basel, Switzerland, 5 1hydroxynaphthalened,8-d{Su1fH% acid, assignors, by mesne assignments, to Saul & (10., New- 2-11Yd10Xy11aPhtha1ene-3fi-d1$111f0fl1c 301d, ark, N. J., as nominee of Fidelity Union Trust Com- 1-hydr0Xynaphthalene-3,6,8-trisulf0nic acid, etc. P y

No Drawing. Application March 3, 1952, Serial No. 274,652

Claims priority, application Switzerland April 25, 1951 6 Claims. (Cl. 260-445) The monoazo dyestuffs of Formula I used for the cou- 10 pling can be prepared by coupling diazotized l-amino-S- hydroxynaphthalene-7-sulfonic acid which is acylated at the 5-positioned hydroxyl group, with an hydroxynaphthalenemono-, dior trisulfonic acid, introducing the 2-positioned hydroxyl group into the radical derived from the 1-amino-5-hydroxynaphthalene-7-sulfonic acid by oxidative coppering, and then splitting off the acyl group from the 5-positioned hydroxyl of the said radicah As the second coupling component, which may be any desired component, use may be made of the aforemen- The present invention provides a new group of cupriferrous trisazo dyestuffs which may be defined as the copper complex compounds of the trisazo dyestufis corresponding to the formula H5O? (|JCHs H0 az (solrr tioned hydroxynaphthalenemonoand disulfonic acids, but any other compound which couples in the position for OH in ortho-position to azo, and n is one of the adjacent a phenolic hydroxyl group or an hydroxyl group integers 1, 2 and 3. derived by enolization can also be used. Thus, use may These new dyestuffs are prepared by coupling the be made for this purpose of for example sulfonated and tetrazo compound from 1 mol of 3,3'-dimethoxy4,4- unsult'onated pyrazolones, pyrazolone carboxylic acids, i -L p ny with 1 Incl of a monoazo y Z-amin0-5-hydroxynaphthalene-7-sulfonic acid, 1-chloro- Stuff of the formula Z-amino-S-hydroxynaphthalene-7-sulfonic acid, 2-acetyl- HO amino-5-hydroxynaphthalene-7-sulfonic acid, 2-benzoylamino-5-hydroXynaphthalene-7-sulfonic acid, Z-methylamino-5-hydroxynaphthalene-7-sulfonic acid, Z-phenylamino-5-hydroxynaphtha1ene-7-sulfonic acid, 1-amino-8- hydroxynaphthalene-4-sulfonic acid, l-phenylamino-S- hydroxynaphthalene 4-sulfonic acid, 2.amino-8-hydroxy- N=N 'R (I) naphthalene-6-sulfonic acid, 2-(4'-carboxyphenylamino)- 8-hydroxynaphthalene 6 sulfonic acid, 1-amino-8-hydroxynaphthalene-3,o-disulfonic acid, 1-amino-8-hydroxynaphthalene4,6-disulfonic acid, l-acetylamino-S-hydroxyponent of the pyrazolone or naphthalene series, X stands H038 OH of a naphthalenemono-, diortrisulfonic acid containspective coupling operations being carried out in any desired order of succession, and then treating the obtained polyazo dyestuff with a copperyielding agent.

Illustrative Of the radical "Of 21 nap hthalenemono dinaphthalene 1 7 disulfonic acid, 2-a;nin 8-hydr0 ytul'lsulfonic acid which has an hydfoxyl group n 9 naphthalene-3,6-disulfonic acid, 2-acetylamino-8-hydroxy- Posmo? to the azo gYQHP, 9 deslgnated by R m the naphthalene- 3,6-disulfonic acid, 1,8-dihydroxynaphthaforegomg formula are mteraha the radlcals of lene-3,6-disulfonic acid. This list of coupling compounds is wholly illustrative in character and is by no means intended to be restrictive or exhaustive.

The monoazo dyestuffs of Formula I, used for coupling, are preferably employed in the form :of copper comdroxynaphthalene-3,6-disulfonic acid, 1-amino-8-hydroxynaphthalene 2,4 disulfonic acid, 1 amino-8-hydroxyl-hydroxynaphthalene-3-sulfonic acid, 1-hydroxynaphthalene-4-sulfonic acid, 1-hydr0xynaphthalene-S-sulfonic acid, 2-hydroxynaphthalene-4-sulfonic acid,

naphthalene 3,5 disulfonic acid, Z-amino-S-hydroxy a a: a: x pier-tee, and the couplin with the tetrazotized 3,3-ditrated sulfuric acid with a blue-green coloration, and methoxy lfi diamino- ,l-diphenyl may take place as dyes cotton in fast marine-blue shades. It corresponds the first stage or the second stage. The couplings are to the formula o-ou (I) m-o 1 1 Hms- 03H HO S- -O( Ju0 SOaH carried out in alkaline medium; preferably in a medium Marine-blue dyestufis. with similar properties can be made alkaline with sodium carbonate, and pyridine may Obtained in entirely analogous manner by coupllng the be added for the second stage coupling. intermediate of the present example with the equivalent In order to prepare copper complexes in substance, the amount of the copper complex of the monoaxo dyestu tf obtained polyazo dyestutfs are treated with copper-yieldof the formula ing agents until the methoxy groups are split and the dyestutf has been converted into the copper complex. The coppering of the dyestuifs may be carried out in diverse Ways, for example by heating in weakly alkaline aqueous HO medium with copper-tetramine-hydroxide complex in the presence or absence of organic cases, or With copper salts in a fusion of an alkali salt of a low molecular weight aliphatic m-onocarboxylic acid. 3

The coppered dyestuffs have an outstanding afiinity for 30 cotton and regenerated cellulose and dye these fibers in marine-blue to gray-blue shades of very good fastness to light and good fastness to Washing.

The following examples set forth representative exemplary embodiments of the invention, and these examples Wherem R stanfis 9 h radical of l'hydroxynaphtha' are intended to be solely illustrative and not at all limit- 5 Sulfomc acld, 2 hydroxynaphthalelle P a-tive. In these examples, the parts and percentages are 01110 acld 0T 2 hydroXynaphthalene 7 Sulfomc 9 by Weight and the temperatures are expressed in degrees centigrade. The term soda refers to sodium carbonate.

40 EXAMPLE 2 EXAMPLE 1 a The tetrazo compound from 24.4 parts of 3,3'-d1- The tetrazo compound from 24.4 parts of 3,3'-dimethoxy" 3 dialnino 11,1, dlphenyl is coupled in methOXyJM, diamino dipheny1 is coupled in a a soda-alkallne medium w1th 30.4 parts of l-hydroxysodwalkaline medium Wiih 304 parts of l hydroxy naphthalene-3,8-d1sulfonic. The resultant intermediate is naphthalneg76 disu1f0nic acii The resultant isolated and introduced into a solution of 55.2 parts of mediate is isolated and introduced into a solution of 55.2 the copper complex of the monoazo rdyestufi of the parts of the copper complex of the monoazo dyestufl of formula the formula HO H0 E038 OH HOzS OH OH OH N=N N=N s OaH 250 parts of pyridine and 50 parts of aqueous ammonia 250 parts of pyridine and-50 parts of ammonia of-25% of 25% strength in 500 parts of water. Upon completion strength in 500 parts of water. Upon completion of the of the coupling, the trisazo dyestuif is isolated and is coupling, the trisazo dyestufi is isolated and is subjected sub ected to conventional demethylating copp'ering with to conventional demethylating coppering with ammoniacal ammomacal copper oxide at 95. in aqueous solution in copper oxide at in aqueous solution in the presence the presence or an organic base. The copper complex of an organic base. The copper complex. of the dyeot the dyestuff is, in the dry state, a dark powder Which stuff is, in the dry state, a dark powder which dissolves dissolves III water with a blue coloration and in concenin Water with blue coloration and in concentrated sulfuric acid with blue-gray coloration, and dyes cotton in fast fate in a sodium acetate melt. In the dry state, the clyei methoxy 4,4 diamino 1,1 diphenyl is coupled in marine-blue shades. It corresponds to the formula stufi is a dark powder which dissolves in water with blue Rois o--ou--o o-ouo 1 I=N- N=I I 0.11 HO|S o-ou- Marine-blue dyestufi's with similar properties can be c l ration and in conc n ra ulf ri inhlue-green obtained in entirely analogous manner by coupling the coloration, a d y cotton in f i -b u S a e intermediate of the present example with the equivalent It corresponds to the formula o-ou-----o t o-ou--o l l Hots o-ou-o I p p N $1- HOaS OaH amount of the copper complex of the monoazo dyestutf Marine-blue dyestuffs with similar properties are obof th formul tained in entirely analogous manner when the tetrazo com- 7 pound is coupled with the equivalent amount of l-hy- E0 droxynaphthalene-4-sulfonic acid or of l-hydroxynaphthalene-S-sulfonic acid or of Z-hydroxynaphthalene-6-sulfonic acid to produce the intermediate and the latter a coupled with the copper complex of the monoazo dye- HmS 0H stufi of the present example.

wherein R stands for the radical of l-hydroxynaphthatetFazo C(fmPOuHd 9 f lene 5 sulfonic acid, 2 hydroxynaphthalene 6 4,4 -d1am1no-1,l -d1phenyl is coupled in a soda-alkaline fonic acid or 2 hydroxynaphthalene 7 sulfonic acid. medmm wlth Parts of the copper complex of the l monoazo dyestufl of the formula EMMPLEB The tetrazo compound from 24.4 parts of 3,3'-diat soda-alkaline medium with 22.4 parts of Z-hydroxynaphthalene-4-sulfonic acid. The resultant intermediate is isolated and introduced into a solution of 63.2 parts H033 CH of the copper complex of the monoazo dyestufi of the formula OH HO =N OIH H058 OH I in solution in 400 parts of water. The resultant intermediate is isolated and introduced into asolution of 25.4 parts of l-(4'-sulfophenyl)-3-methyl-5-pyrazolone s $0311 and 40 parts of sodium carbonate in 500 parts of water.

Upon completion of the coupling, the trisazo dyestuff is iso 7 lated and subjected to conventional demethylating coppering with ammoniacal copper oxide at 95 in aqueous 250 parts of pyridine and 50 parts of aqueous ammonia solution in the presence ofan organic base. In the dry of 25% strength in 500 parts of water. Upon complestate, the copper complex is a dark powder which distion of the coupling, the trisazo dyestuff is isolated and solves in water with reddish blue coloration and in conis subjected to demethylating coppering with copper sulcentrated sulfuric acid with greenish-blue coloration, and

dyes gottonin reddish gray-blue .shades. Itcorresponds in the respective formulae) and on the other hand with to the formula 1 mol of the saine or" of another coupling com onent 0 (Eu 0 0 gu-O g l i HOaS O-Oll-O om i N I sonar r The fo lloyving tahlesetsiforth additional dyestuffs which 7 p I v i can be obtained according to the foregoing examples by (as indicated'in: the respective formulae) in alkaline coupling the tetrazo compound from 1 mol of 3,3-di medium, preferably soda-alkaline, and optionally with the methoxy-4,4'-diamino-1,1-dipheny1 on the one hand with addition of pyridine, followed by conventional dernethyl- 1 mol of the monoazo dyestutf of Formula I (as indicated ating coppering:

iifi Copper Comp1ex 0f 1$ Cotton 5 OH 11x0 0 0 CH3 marine-blue.

H025 s 0311 B038 6 HO OH H3 0 O 0 CH3 Do.

H 03s s 03H H038 7 0113c OHN 0H H300 00H; Do,

H035 503E nods 8 7 0H H50 0 a O OH; OH Do,

OHaOOHN SOQH H038 )11 HOaS . 2,779,755 a 9 v r 10, a l A L l, Products wherein theCHzCOHN-radical is replaced by obtained as described in Example 1, are dissolved in CHsNH, C2H5NH-, C6H5NH-- or CHs-CsH4-NH-' 30,000 parts of water, and 300 parts of sodium sulfate are are very similar to No. 8. added. 1000 parts of cotton are introduced at 30, then Example Shade of No. Copper Complex of- D 0111;

i on otoou 0H moo 00m 0H marinel i 0 blue.

=N N=N- HI I 08H l l B015 011 Hols 0'11 10 OH H36? 0cm 0H Do.

7 I OH HOxS- OsH 11. E10 0 0 OH; OH reddish 0H3 gay- I lue. /OCHN=N- N= l no s OH I N-oo V HO;S 0.11

12 OH moo 00111 on marineblue. HO 0 (JOHN N=N N=N r SOsH Hols 0H HO S- soar EXAMPLE 13 the bath is heated to boiling temperature in 30 minutes,

boiling is continued for 15 minutes, and after 15 minutes 20 parts of the copper complex compound of the the dyed cotton is withdrawn from the dyebath, rinsed and a dried.

formula EOaS 1 1 Having thus disclosed the invention, wha t is claimed is: stands for the radical of a coupling component selected 21 1 2; coppc r cor nplex compound of a trisazo dyestuff from the group consisting of radicals of the pyrazolone pol'xe sponding to the formula v and hydroxynaphthalene series, each X standsfor OH in 1-; $00 oom H0 X l J H088 on ain-gqsoamn wherein" ortho-position to -azo-, and It stands for one of the X integers 1, 2 and 3. k 2. The copper complex compound corresponding to the 1 formula 3u O O-'-Qu-O I I HOzS- S03H H033 0-ou0 I v =N 3. The copper complex compound corresponding to the formula H085 o-ou o 0 ou0 I l =N N=1\T l 1 V N =$I SOaH 4. The copper complex compound corresponding to the formula 0-ou 0 o m-o I I Hols 1 I=N N=lir HOaS O-Qu-O V N 1 I HO|S SOIH 5. The copper complex compound'corresponding to the formula.

' oou o 0 911-0 l r l t =N 7. N=N V V 1103s 0-qu-0 l son: 1 1 I HO S sOtH 

1. A COPPER COMPLEX COMPOUND OF A TRISAZO DYESTUFF CORRESPONDING TO THE FORMULA 